I used Asus X51Na-Go125 for like 1 year and I faced too many problems as this one is very slow and cant handle many applications at one time. Its price is low, so is the laptop. And you cant even think of playing games on it as it starts heating up which in turn slows down the processor.
Otherwise the design and style is perfect. But its not user friendly and you cant rely on this laptop. Also its battery life is bad, at the starting days it was good but just after 3-4 months the laptop started consuming more and more.
Service and support is nice, the staff is friendly and will put maximum effort to solve your issue. But overall I would suggest you to not to buy this laptop as it does not worth the money.